What happens if the gas itself has a different temperature to that of the sensor?
The zero offset current of the sensor is dependent on the temperature of the sensor itself and as such the temperature of the gas stream being measured will have little effect on the zero offset signal. The span signal of the sensor is dependent on the rate of diffusion of gas molecules through the capillary hole to the sensing electrode for subsequent reaction. A gas diffusing through the capillary hole at a different temperature to that of the gas inside the sensor could have a small impact on the sensitivity of the sensor. It may also cause small shifts or transient currents until equilibrium is fully established.
